blake



E. S. 8u EnH., BLAKE. Ore-Crushing Machine.

PatentedAprn 21, 1880.

UNITED STATES PATENT OFFICEo EDWARDS. BLAKE AND HENRY H. BLAKE, OF PITTSBURG, PA.

ORE-CRUSHING MACHINE.

SPECIFICATION forming' part of Letters Patent No. 226,964, dated April 27, 1880.

Application filed December 9, 1879.

To all whom it may concern:

Be it known that we, EDWARD S. BLAKE and HENRY H. BLAKE. of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Ore-Crushing Machines; and we do hereby declare the following to be a full, clear, and exact description of the invention, vsuch as will enable those skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, in which- Figure 1 is a longitudinal vertical section of our machine. Fig. 2 is a detail, showing the devices for connecting the fly-.wheel shaft to the toggles. Fig. 3 shows the relations ofthe toggle and toggle-block. Fig. 4. 4is a detail section, exhibiting the relations of the toggles, toggle-rest, anti-friction rollers, and pitman. Figs. 5 and 6 are modifications.

ln ore and rock crushing machines the great y weight required to withstand the pressure and the power necessary to move such masses and overcome their internal friction are obstacles to their adoption in many circumstances, and itis hi ghlyimportant to surmount them. Every pound of steam saved an d every particle of friction avoided become at once factors in the more economical construct-ion and use of the machine.

To these ends our invention consists in so construciin g the parts and applying the power that the greater part of the internal work is done by rolling contact as distinguished from sliding or rubbing friction. rEhe coefficient of the former being much less than that of the latter, a great gain in power is the necessary result.

Our invention further consists in the construction and combination of parts, as hereinafter fully described. 1

A is the frame; B, the fixed jaw; C, the movable or vibrating jaw, and D the eccentric of the ily-wheel shaft, all of the usual form and relative location.

The toggle-seats A in the frame A and jaw C differ from those commonly made. The toggle end is curved; but the toggle-block has a curve of greater sweep or radius, so that the toggles E bear against the frame and vibrating jaw in rolling contact, whereas in the common form the toggle-seat accurately ts the' convex end of the toggle, the contact thus being a rubbing or sliding one. This difference effects a great reduction of the friction, and, in consequence, considerable economy in the power required to move the toggles against a given resistance. rI he adjacent ends of the two toggles are also slightly curved, and are so arranged as to bear directly upon each other, whereby the contact in operation vis rolling, as distinguishable from the sliding friction at present met with in the accurately-fitted toggles and seats in the pitnian. Here again we reduce the coefficient of friction and diminish the power necessary to drive the jaw against a given resistance.

The usual eccentric, D. is arranged on' the shaft ofthe ily-wheel. On top of this is a piece similar to the cap of a pillow-block, which, for distinction, we term the eccentric -box g. Passing through the flanges of the box g are the ends of two headed bolts, h, whose heads support a plate, a, which has at its middle a transverse slot. This slot is long enough to permit the passage of the bent ends of the U- shaped rod/when compressed together. When through the slot they spread outwardly, and are held in positionbya wedge or key, k. The hooked ends of the rod thus are retained above plate a. The lower end of rod t' thence passes down through a slot in the toggles E and the toggle-rest I, which is constructed as follows, (see Fig. ltr)v lt is composed of two parts. Part l has transverse slots m, and is bolted to the under part, a. Before bolting together small anti-friction rollers o are placed in the lslots, the rollers being preferably somewhat smaller in diameter than the slots, but greater,

than the thickness of plate Z, so as to project slightly above its top. A slight dip is made in the top of the under block, a, so that rollers o will normally always roll to a given position. The rollers are located directly'under the toggles E. Now, when the rest l is drawn upwardly by the revolution of the shaft, it lifts the toggles,causing their convex ends to move together in rolling contact, and their contact with the rest I is also made rolling by the i11- terposition of the rollers o.

The restl has guards or flanges properly located, as shown, to preserve the position of IOO the toggles in cases of high speed or sudden relaxation ot' strain in the jaws. Rod ris held by a transverse key or bar, s, passing through its bend under the rest I.

Thus constructed, the bolts h, plate a, rod i, and rest I together constitute the pitman ci' the machine, whose length is adjusted by means of the top nuts, L, thereby regulating the size ot' bite between thejaws.

If desired, a suitable dust-protector may be applied to these parts.

Such a machine has internally no rubbing or sliding friction whatever except that found between the eccentric and box. On the contrary, all the remaining parts are in rolling contact, and therefore the parts may be made less massive, and much less expenditure of power is required in driving them than when sliding friction is met with in operating.

In Fig. 6 the toggles are respectively concave and convex, with similar differences ot' radius to the betbre-described arrangement o't' toggle and toggle-seat.

In Fig. 5 another modification is shown, in which rod t is replaced by two separate boltrods, i, with heads m below the rest I, and held together by the ring n and bar p.

In the above description, where we use the term rolling contact77 we mean a contact such as exists between a wheel in motion and the surface over which it travels, or that existing between two Wheels or rolls other.

We claim as our inventionl. In a crushing-machine, two toggles having their adjacent ends curved and in direct contact with each other7 substantially as described, whereby the work is accomplished by rolling Contact as distinguished from sliding friction.

2. In a crushing-machine, the combination, with the frame, vibrating jaw, and eccentricshaft, of two toggles, having their adjacent ends curved and in direct contact, substantially as set forth.

3. The combination of the slotted toggles E, eccentric D, and cap g with the U-shaped rod 17, connected to the cap g, the rest I, and the bar or bolt s, substantially as described.

el. The combination ot' togglcs E and togglerest I, having the transverse rollers o, substantially as described.

rlhe combination of cap y, nuts h, bolts la, and slotted plate a with the rod fi and wedge or key L, substantially as shown.

In testimony whereof we have hereto set our hands this 4th day of December, 1879.

EDWIARD S. BLAKE. HENRY E. BLAKE.

which bite on each Vitnesses:

T. J. MCTIGHE, JOHN M. PATTERSON. 

